Sanlam Personal Loans - Keep deducting payments after loan was paid in full.

My husband had a personal loan with Sanlam. In December 2024 we requested the settlement amount for the loan, and he settled the loan immediately. We sent the proof of payment to customer care the cancel the debit order. On the 19th of December a payment was deducted from his account. He had to call the call center to request a refund. He was told that he will only receive the refund with in 31 days but luckily, he received the refund much earlier. The call center agent also told him that the debit order will be stopped. BUT SUPRISE SUPRISE A OTHER PAYMENT WAS DEDUCTE FROM HIS ACCOUNT, 27/01/2025 What must we do before Sanlam will cancels the debit order. Don't they see that account is nil. To email the call center is useless because they never come back to you and if you call the call center you have to hold on for ages and if some answers, they do not do what they gone do.